THRA.9 Flashcards
Articulatio humeri is composed of which boney structures?
- Cavitas glenoidalis (Scapula)
- Caput humeri (Humerus)
Cavitas glenoidalis is deepened and surrounded by which structure?
Labrum glenoidale
What kind of joint is articulatio humeri?
Spheroidal
Although limited to hinge motion
Which strucrures act as a medial and lateral collateral ligament in the articulatio humeri?
- Medial: The tendon of m. subscapularis
- Lateral: The tendon of m. infraspinatus
How many recesses are present in articulatio humeri?
- Eq/Ru: 3 cranial, 2 caudolateral
- Ca/Su: 2 cranial, 1 caudolateral
- Cranial: Recessi bicipitalis
- Caudolateral: Recessus caudalis
Which structures strengthen the capsula articularis of articulatio humeri?
- Lig. glenohumerale medialis
- Lig. glenohumerale lateralis
- Lig. coracohumerale (Eq/Ru/Su)
Which structure holds the tendon of origin of m. biceps brachii in place?
- Lig. transversum humeri* (ØEq)
- (Retinaculum transversum)*
Vagina synovialis intertubercularis is formed by…
In which species?
Part of the joint capsule surrounding the bicipital tendon in the intertubercular groove
Ca/Su
The equivilant of vagina synovialis intertubercularis in Eq/Ru is the…
Bursa subtendinea bicipitalis
(Doesn’t communicate with shoulder joint capsule)
Arterial blood supply to the shoulder is by which arteries?
- A. axillaris
- A. cervicalis superficialis
- A. subscapularis
Which nerves innervate the shoulder?
- N. axillaris
- N. suprascapularis
Name the bursa between the skin and tuber spina scapulae in equine
Bursa subcutanea prescapularis
Name the bursa found between the tendon of insertion of m. infraspinatus and pars caudalis of the tuberculum majus humeri
Bursa subtendinea m. infraspinati
Name the bursa found under the tendon of insertion of m. subscapularis, passing over the shoulder joint
Bursa subtendinea m. subscapularis
List the stabilisers of the shoulder joint
- M. articularis humeri (ØCa and Ru)
- M. infraspinatus
- M. subscapularis
List the extensors of the shoulder joint
- M. supraspinatus
- M. brachiocephalicus
- M. biceps brachii
- M. coracobrachialis
List the flexors of the shoulder joint
- M. deltoideus
- M. teres major
- M. teres minor
- M. triceps brachii capus longum
- M. latissimus dorsi
M. Deltoideus Pars Scapularis
Origin: Caudal spina scapulae
Insertion: Tuberositas deltoidea of Humerus
Action: Flex Shoulder
Innervation: N. axillaris
Blood supply: A. cervicalis superficialis, a. subscapularis, a. circumflexa humeri caudalis
M. Deltoideus Pars Acromialis
Origin: Acromion
Insertion: Tuberositas deltoidea of Humerus
Action: Flex Shoulder
Innervation: N. axillaris
Blood supply: A. cervicalis superficialis, a. subscapularis, a. circumflexa humeri caudalis
M. Infraspinatus
Origin: Fossa infraspinata, spina scapulae, margo caudalis scapulae
Insertion: Facies m. infraspinati of Humerus
Action: Flex Shoulder Joint, Acts as a collateral ligament
Innervation: N. suprascapularis
Blood supply: A. cervicalis superficialis, a. circumflexa scapulae, a. circumflexa humeri caudalis